Used to seal the opening where the Direct-Temp pipe penetrates the roof at 0 12 to 6 12 pitch. Direct-Temp system features stainless steel inner and heavy duty galvanized steel outer walls. Heavy duty centering brackets keep inner pipe centered and chamfered edges allow for easy slide-together assembly. The free-floating inner liner allows the pipe to expand and contract under high temperature, without creating gaps or stress points. The LockTab(r) is a unique design that allows for 360° rotation while securely locking the sections of pipe together with just a push of the tab.Siliconozed fiberglass seal LockTab security Pipe rotates easily to align system components No sealant required High efficiency performanceBase Length: 18 Base Width: 15-1 4 Finish: Galvanized Fuel Type: Gas, Pellet Height: 4 Inner Wall: 304 Stainless Steel Joint Connection Overlap: 1-5 8 Joint Connection Type: Twist-Lock standard on all diameters Material: Galvanized Steel, Stainless Steel Outer Wall: Heavy duty galvanized steel Pipe Class: Direct Vent Pipe Inside Diameter: 4 x 6-5 8 Pipe Shape: Round UL Listed: Yes Vent Construction: Double Wall
